铸造铝合金中氧化夹杂物研究进展.pdfVIP

学兔兔 Dec．2009 VOI．58 NO．12 ‘ 、^^ ● ●^● ■ — ● {专题综述 l ■ ，’n●、 ■’， ●_ n●、一 铸造铝合金中氧化夹杂物的研究进展 毕娟娟，廖恒成，潘 冶，孙国雄 (东南大学材料科学与工程学院，江苏省先进金属材料高技术研究重点实验室，江苏南京211189) 摘要：就铸造铝合金中氧化夹杂物的来源和形成过程、对铝液吸氢、铝铸件中孔洞形成和铸件力学性能的影响进行了 分析，并对国内外铝合金铸件中氧化夹杂的研究进展进行了综述。在熔铸过程中形成的氧化夹杂物，是铝液中夹杂物 的主体，对铝液吸氢和铝合金铸件中孔洞的形成有着不可忽视的影响。铝合金铸件的力学性能与铝液中的氧化夹杂密 切相关，夹杂物可作为显微裂纹的发源地，严重削弱铝合金铸件的力学性能。 关键词：铸造铝合金；氧化夹杂；气孔 (缩孑L) 中图分类号：TG146．2 1 文献标识码：A 文章编号：1001—4977(2009)12—1224—05 Research Progress on Oxide Inclusions in Cast AIuminum Alloys BI Juan-juan，LIAO Heng—cheng，PAN Ye，SUN Guo—xiong (Jiangsu Key Laboratory for Advanced Metallic Materials，School of Material Science and Engineering，Southeast University，Nanjing 21 1 1 89，Jiangsu，China) Abstract：The origination and formation of oxide inclusions in cast aIuminum alloys were discussed． as welI as their effect on the absorption process of hydrogen in liquid aIuminum．the formation of macro／microporosity and reactant mechanical properties of aIuminum castings。The research progress，domestic and abroad，of oxide inclusions in cast aluminum alloys was reviewed．The oxide inclusions fOrmina in the process of aluminum melting and pouring are the main inclusions in liquid aIuminum．which have an important influence on hydrogen content absorbed by aluminUm liquid and formation of porosities in the castings．They also weaken the mechanical properties of aluminum alloy castings，as the origin of cracks． Key WOrds：casting aIuminum alloys；oxide inclusions；porosity 随着现代制造材料构成的变化，低密度材料使用